diff --git a/Makefile.in b/Makefile.in
index 2deed5f..722492d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -166,7 +166,7 @@ SHA2ASM_SRCS = crypto/sha2/intel/sha512_avx.asm crypto/sha2/intel/sha512_sse4.as
 SHA2ASM_OBJS = $(SHA2ASM_SRCS:.asm=.o)
 SHA2_OBJS = $(SHA2_SRCS:.c=.o)
 
-YASM = @YASM@ -f x64 -f elf64 -X gnu -g dwarf2 -D LINUX
+YASM = @YASM@
 LIBBSCWRAP = libbsc_compress.c
 LIBBSCWRAPOBJ = libbsc_compress.o
 LIBBSCDIR = @LIBBSCDIR@
diff --git a/config b/config
index acb811c..0ec979c 100755
--- a/config
+++ b/config
@@ -74,6 +74,8 @@ sha256asmobjs=
 sha256objs=
 keylen=
 yasm=yasm
+yasm_params_linux="-f x64 -f elf64 -X gnu -g dwarf2 -D LINUX"
+yasm_params_osx="-f macho64 -X gnu -p gas"
 keccak_srcs=
 keccak_hdrs=
 keccak_srcs_asm=
@@ -274,7 +276,10 @@ fi
 echo $plat | egrep 'x86_64|amd64' > /dev/null
 if [ $? -eq 0 ]
 then
-	skeinblock='\$\(SKEIN_BLOCK_ASM\)'
+	if [ "$OS" != "Darwin" ]
+	then
+		skeinblock='\$\(SKEIN_BLOCK_ASM\)'
+	fi
 	yasm=
 
 	#
@@ -304,6 +309,17 @@ then
 		exit 1
 	fi
 
+	if [ "$OS" = "Linux" ]
+	then
+		yasm="${yasm} ${yasm_params_linux}"
+	elif [ "$OS" = "Darwin" ]
+	then
+		yasm="${yasm} ${yasm_params_osx}"
+	elif [ "$OS" = "SunOS" ]
+	then
+		yasm="${yasm} ${yasm_params_linux}"
+	fi
+
 	if [ $debug -eq 1 ]
 	then
 		keccak_srcs='\$\(KECCAK_SRC_OPT64\)'
@@ -436,7 +452,7 @@ else
 	echo "Yes."
 fi
 
-rm -f tst*
+rm -rf tst*
 openssl_libdir="${openssl_libdir},--enable-new-dtags"
 
 # Detect other library packages
@@ -581,7 +597,7 @@ then
         echo "Libarchive version 3.0 or newer is required."
 	exit 1
 fi
-rm -f tst tst.c
+rm -rf tst* tst.c
 
 echo "Generating Makefile ..."
 linkvar="LINK"
diff --git a/crypto/sha2/sha512.c b/crypto/sha2/sha512.c
index c985944..5c2c66c 100644
--- a/crypto/sha2/sha512.c
+++ b/crypto/sha2/sha512.c
@@ -130,7 +130,7 @@ static const uint64_t iv256[SHA512_HASH_WORDS] = {
 static update_func_ptr sha512_update_func;
 
 int
-APS_NAMESPACE(Init_SHA512) (processor_info_t *pc)
+APS_NAMESPACE(Init_SHA512) (processor_cap_t *pc)
 {
 	if (pc->proc_type == PROC_X64_INTEL || pc->proc_type == PROC_X64_AMD) {
 		if (pc->avx_level > 0) {
diff --git a/crypto/sha2/sha512.h b/crypto/sha2/sha512.h
index 08c24be..b7bbf69 100644
--- a/crypto/sha2/sha512.h
+++ b/crypto/sha2/sha512.h
@@ -97,7 +97,7 @@ extern "C" {
 void APS_NAMESPACE(SHA512_Init) (SHA512_Context *sc);
 void APS_NAMESPACE(SHA512_Update) (SHA512_Context *sc, const void *data, size_t len);
 void APS_NAMESPACE(SHA512_Final) (SHA512_Context *sc, uint8_t hash[SHA512_HASH_SIZE]);
-int  APS_NAMESPACE(Init_SHA512) (processor_info_t *pc);
+int  APS_NAMESPACE(Init_SHA512) (processor_cap_t *pc);
 
 /* As are SHA-512/256 and SHA-512/224 */
 #define SHA512t256_Context SHA512_Context
diff --git a/rabin/global/dedupe_config.c b/rabin/global/dedupe_config.c
index 1d93e6a..89b1998 100644
--- a/rabin/global/dedupe_config.c
+++ b/rabin/global/dedupe_config.c
@@ -247,7 +247,7 @@ read_config(char *configfile, archive_config_t *cfg)
 			}
 		} else if (strncmp(line, "ARCHIVESZ", 9) == 0) {
 			int ovr;
-			ssize_t arch_sz;
+			int64_t arch_sz;
 			ovr = parse_numeric(&arch_sz, pos);
 			if (ovr == 1) {
 				log_msg(LOG_ERR, 0, "ARCHIVESZ value too large.\n");
diff --git a/utils/sse_level.c b/utils/sse_level.c
index 3ecb9a0..0ddb2e4 100644
--- a/utils/sse_level.c
+++ b/utils/sse_level.c
@@ -29,7 +29,7 @@
 int
 main(void)
 {
-	processor_info_t pc;
+	processor_cap_t pc;
 	cpuid_basic_identify(&pc);
 	if (pc.sse_level == 3 && pc.sse_sub_level == 1) {
 		printf("ssse%d", pc.sse_level);